Yesterday ik put BT5 on a USB and booted from it. BT starts, but my old hard drive (C:\) is missing. When ik try to reboot without the BT5 USB stick into my laptop, the bios can't find my C drive with Windows7anymore. Also my DVDrom drive isn't appearing anymore? I'n really new to BT5, can't find any solutions for my problem in the wiki or bachtrack-linux website, and i really need some files i had on the former W7 installation. Did i **** up my mbr of my hard drive?
Thanks in advance for any help...

Greetz ViTo

Edit:

The last 2 days i've read alot more and am starting to 'get to know BT5' just a tiny little bit.
I've probaply overwritten my old mbr by installing BT5 (without any knowledge) through unetbootin onto a USB stick. After that the bios didn't displayed my internal HD and DVD rom, only a strange bunch of numbers.
I read that with GRUB you can boot and use some utilities to fix the mbr, just like fixmbr.exe on a windows repair action.
After turning on my PC and boot from the USB, i can type in GRUB and than i find some help words. But there i hang now.....
I don't know which commands or code i have tot put in to start the GRUB mbr rewrite tool? Because i like BT5 alot and don't want to **** up (maybe i already did) my precious and longtimetaking .fla files and some precious pictures ik haven't just started to type something in the GRUB commandline.....